import unittest

import sys


class HW2016AlgSuite(unittest.TestCase):
    def test_1st(self):
        import sys

        while True:
            try:
                line = input()
                print(sum(map(int, line.split(' '))))
            except:
                break

    def test_something(self):
        self.assertEqual(True, True)


if __name__ == '__main__':
    unittest.main()
